Investigation of bone mineral density and the incidence of osteoporosis in healthy Manchus,Han,and Korean nationalities in Dandong area

Objective To investigate bone mineral density(BMD) in Manchus,Han,and Korean nationalities in Dandong area,and to learn the incidence of osteoporosis(OP) and related risk factors.Methods BMD of the peripheral bone was measured using DTX-200 BMD detector made by American Osteometer Medi Tech Corporation.From August to December 2010,2203 Manchus,Han,and Korean people were divided into different groups on the basis of 10-year-old,and the BMDs of the distal radius and ulna of the non-dominant forearm were determined.Data were analyzed statistically and a questionnaire concerning OP-related risk factors was filled meanwhile.Results The peak BMDs in Manchus,Han,and Korean in Dandong area appeared in the 40-49,30-39,and 30-39 age groups,with the values of 0.563±0.076 g/cm2,0.573±0.085 g/cm2,and 0.518±0.100 g/cm2,respectively.A gradual decrease in BMD was shown along with aging,and the lowest BMD appeared in the group of over 80 years of age.There was no difference of the incidence of OP among the three nationalities in the groups aged over 40(P0.05),which were 11.9%,10.7%,and 9.8%,respectively.In Manchus people,there was significant positive correlation between BMD and age(P0.05).In Han,there was more incidence of OP in women than in men(P0.05).In Korean,there were significant positive correlation between BMD and age,and between BMD and long term vegetable intake(P0.05).Conclusion The investigation of BMD in different nationalities in Dandong area facilitates the establishment of diagnostic standard of OP in Manchus,Han,and Korean nationalities,and provides evidence for the prevention and treatment of OP and its complications.